In a mixing bowl, combine the sugar, steak seasoning, chili powder, smoked paprika, cumin and allspice. Add the ground meat to the bowl and give everything a good mix with your hands. Press the meat down in the bowl and score it into four portions using the side of your hand. Scoop out one of the portions and shape it into a burger that's about an inch thick. Press down into the center of it with your thumb while you're shaping it to keep the burger from expanding during cooking. Shape the remaining portions to give you a total of four burgers.